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1 Jan 1941 Jahr - Glenn Seaborg discovers plutonium. The U.S. Committee on X‑ray Protection recommends adoption of maximum body burden of 0.1 microCurie for radium. L.S. Taylor recommends lowering the x‑ray exposure dose to 0.02 Roentgens/day.
Zugefügt zum Band der Zeit:
Radiation Timeline
By
Joshua Ha
8 Jun 2018
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0
523
Datum:
1 Jan 1941 Jahr
Jetzt
~ 84 years ago
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